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## Changes 🏗️ <img width="800" height="621" alt="Screenshot 2026-02-11 at 19 32 39" src="https://github.com/user-attachments/assets/e97be1a7-972e-4ae0-8dfa-6ade63cf287b" /> When the BE API has an error, prevent it from leaking into the stream and instead handle it gracefully via toast. ## Checklist 📋 ### For code changes: - [x] I have clearly listed my changes in the PR description - [x] I have made a test plan - [x] I have tested my changes according to the test plan: - [x] Run the app locally and trust the changes <!-- greptile_comment --> <h2>Greptile Overview</h2> <details><summary><h3>Greptile Summary</h3></summary> This PR fixes an issue where backend API stream errors were leaking into the chat prompt instead of being handled gracefully. The fix involves both backend and frontend changes to ensure error events conform to the AI SDK's strict schema. **Key Changes:** - **Backend (`response_model.py`)**: Added custom `to_sse()` method for `StreamError` that only emits `type` and `errorText` fields, stripping extra fields like `code` and `details` that cause AI SDK validation failures - **Backend (`prompt.py`)**: Added validation step after context compression to remove orphaned tool responses without matching tool calls, preventing "unexpected tool_use_id" API errors - **Frontend (`route.ts`)**: Implemented SSE stream normalization with `normalizeSSEStream()` and `normalizeSSEEvent()` functions to strip non-conforming fields from error events before they reach the AI SDK - **Frontend (`ChatMessagesContainer.tsx`)**: Added toast notifications for errors and improved error display UI with deduplication logic The changes ensure a clean separation between internal error metadata (useful for logging/debugging) and the strict schema required by the AI SDK on the frontend. </details> <details><summary><h3>Confidence Score: 4/5</h3></summary> - This PR is safe to merge with low risk - The changes are well-structured and address a specific bug with proper error handling. The dual-layer approach (backend filtering in `to_sse()` + frontend normalization) provides defense-in-depth. However, the lack of automated tests for the new error normalization logic and the potential for edge cases in SSE parsing prevent a perfect score. - Pay close attention to `autogpt_platform/frontend/src/app/api/chat/sessions/[sessionId]/stream/route.ts` - the SSE normalization logic should be tested with various error scenarios </details> <details><summary><h3>Sequence Diagram</h3></summary> ```mermaid sequenceDiagram participant User participant Frontend as ChatMessagesContainer participant Proxy as /api/chat/.../stream participant Backend as Backend API participant AISDK as AI SDK User->>Frontend: Send message Frontend->>Proxy: POST with message Proxy->>Backend: Forward request with auth Backend->>Backend: Process message alt Success Path Backend->>Proxy: SSE stream (text-delta, etc.) Proxy->>Proxy: normalizeSSEStream (pass through) Proxy->>AISDK: Forward SSE events AISDK->>Frontend: Update messages Frontend->>User: Display response else Error Path Backend->>Backend: StreamError.to_sse() Note over Backend: Only emit {type, errorText} Backend->>Proxy: SSE error event Proxy->>Proxy: normalizeSSEEvent() Note over Proxy: Strip extra fields (code, details) Proxy->>AISDK: {type: "error", errorText: "..."} AISDK->>Frontend: error state updated Frontend->>Frontend: Toast notification (deduplicated) Frontend->>User: Show error UI + toast end ``` </details> <!-- greptile_other_comments_section --> <!-- /greptile_comment --> --------- Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com> Co-authored-by: Otto-AGPT <otto@agpt.co>
This is the frontend for AutoGPT's next generation
🧢 Getting Started
This project uses pnpm as the package manager via corepack. Corepack is a Node.js tool that automatically manages package managers without requiring global installations.
For architecture, conventions, data fetching, feature flags, design system usage, state management, and PR process, see CONTRIBUTING.md. For Playwright and Storybook testing setup, see TESTING.md.
Prerequisites
Make sure you have Node.js 16.10+ installed. Corepack is included with Node.js by default.
Setup
1. Enable corepack (run this once on your system):
corepack enable
This enables corepack to automatically manage pnpm based on the packageManager field in package.json.
2. Install dependencies:
pnpm i
3. Start the development server:
Running the Front-end & Back-end separately
We recommend this approach if you are doing active development on the project. First spin up the Back-end:
# on `autogpt_platform`
docker compose --profile local up deps_backend -d
# on `autogpt_platform/backend`
poetry run app
Then start the Front-end:
# on `autogpt_platform/frontend`
pnpm dev
Open http://localhost:3000 with your browser to see the result. If the server starts on http://localhost:3001 it means the Front-end is already running via Docker. You have to kill the container then or do docker compose down.
You can start editing the page by modifying app/page.tsx. The page auto-updates as you edit the file.
Running both the Front-end and Back-end via Docker
If you run:
# on `autogpt_platform`
docker compose up -d
It will spin up the Back-end and Front-end via Docker. The Front-end will start on port 3000. This might not be
what you want when actively contributing to the Front-end as you won't have direct/easy access to the Next.js dev server.
Subsequent Runs
For subsequent development sessions, you only need to run:
pnpm dev
Every time a new Front-end dependency is added by you or others, you will need to run pnpm i to install the new dependencies.
Available Scripts
pnpm dev- Start development serverpnpm build- Build for productionpnpm start- Start production serverpnpm lint- Run ESLint and Prettier checkspnpm format- Format code with Prettierpnpm types- Run TypeScript type checkingpnpm test- Run Playwright testspnpm test-ui- Run Playwright tests with UIpnpm fetch:openapi- Fetch OpenAPI spec from backendpnpm generate:api-client- Generate API client from OpenAPI specpnpm generate:api- Fetch OpenAPI spec and generate API client
This project uses next/font to automatically optimize and load Inter, a custom Google Font.
🔄 Data Fetching
See CONTRIBUTING.md for guidance on generated API hooks, SSR + hydration patterns, and usage examples. You generally do not need to run OpenAPI commands unless adding/modifying backend endpoints.
🚩 Feature Flags
See CONTRIBUTING.md for feature flag usage patterns, local development with mocks, and how to add new flags.
🚚 Deploy
TODO
📙 Storybook
Storybook is a powerful development environment for UI components. It allows you to build UI components in isolation, making it easier to develop, test, and document your components independently from your main application.
Purpose in the Development Process
- Component Development: Develop and test UI components in isolation.
- Visual Testing: Easily spot visual regressions.
- Documentation: Automatically document components and their props.
- Collaboration: Share components with your team or stakeholders for feedback.
How to Use Storybook
-
Start Storybook: Run the following command to start the Storybook development server:
pnpm storybookThis will start Storybook on port 6006. Open http://localhost:6006 in your browser to view your component library.
-
Build Storybook: To build a static version of Storybook for deployment, use:
pnpm build-storybook -
Running Storybook Tests: Storybook tests can be run using:
pnpm test-storybook -
Writing Stories: Create
.stories.tsxfiles alongside your components to define different states and variations of your components.
By integrating Storybook into our development workflow, we can streamline UI development, improve component reusability, and maintain a consistent design system across the project.
🔭 Tech Stack
Core Framework & Language
- Next.js - React framework with App Router
- React - UI library for building user interfaces
- TypeScript - Typed JavaScript for better developer experience
Styling & UI Components
- Tailwind CSS - Utility-first CSS framework
- shadcn/ui - Re-usable components built with Radix UI and Tailwind CSS
- Radix UI - Headless UI components for accessibility
- Phosphor Icons - Icon set used across the app
- Framer Motion - Animation library for React
Development & Testing
- Storybook - Component development environment
- Playwright - End-to-end testing framework
- ESLint - JavaScript/TypeScript linting
- Prettier - Code formatting
Backend & Services
- Supabase - Backend-as-a-Service (database, auth, storage)
- Sentry - Error monitoring and performance tracking
Package Management
Additional Libraries
- React Hook Form - Forms with easy validation
- Zod - TypeScript-first schema validation
- React Table - Headless table library
- React Flow - Interactive node-based diagrams
- React Query - Data fetching and caching
- React Query DevTools - Debugging tool for React Query
Development Tools
NEXT_PUBLIC_REACT_QUERY_DEVTOOL- Enable React Query DevTools. Set totrueto enable.